49144a374b604a9afa0bfa51670e7a11db894123
2 * Copyright (C) 2010 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 #ifndef ANDROID_CUTILS_ATOMIC_MIPS_H
18 #define ANDROID_CUTILS_ATOMIC_MIPS_H
22 extern inline void android_compiler_barrier(void)
24 __asm__
__volatile__ ("" : : : "memory");
28 extern inline void android_memory_barrier(void)
30 android_compiler_barrier();
32 extern inline void android_memory_store_barrier(void)
34 android_compiler_barrier();
37 extern inline void android_memory_barrier(void)
39 __asm__
__volatile__ ("sync" : : : "memory");
41 extern inline void android_memory_store_barrier(void)
43 __asm__
__volatile__ ("sync" : : : "memory");
47 extern inline int32_t android_atomic_acquire_load(volatile const int32_t *ptr
)
50 android_memory_barrier();
54 extern inline int32_t android_atomic_release_load(volatile const int32_t *ptr
)
56 android_memory_barrier();
60 extern inline void android_atomic_acquire_store(int32_t value
,
61 volatile int32_t *ptr
)
64 android_memory_barrier();
67 extern inline void android_atomic_release_store(int32_t value
,
68 volatile int32_t *ptr
)
70 android_memory_barrier();
74 extern inline int android_atomic_cas(int32_t old_value
, int32_t new_value
,
75 volatile int32_t *ptr
)
79 __asm__
__volatile__ (
80 " ll %[prev], (%[ptr])\n"
82 " bne %[prev], %[old], 9f\n"
83 " move %[status], %[new_value]\n"
84 " sc %[status], (%[ptr])\n"
86 : [prev
] "=&r" (prev
), [status
] "=&r" (status
)
87 : [ptr
] "r" (ptr
), [old
] "r" (old_value
), [new_value
] "r" (new_value
)
89 } while (__builtin_expect(status
== 0, 0));
90 return prev
!= old_value
;
93 extern inline int android_atomic_acquire_cas(int32_t old_value
,
95 volatile int32_t *ptr
)
97 int status
= android_atomic_cas(old_value
, new_value
, ptr
);
98 android_memory_barrier();
102 extern inline int android_atomic_release_cas(int32_t old_value
,
104 volatile int32_t *ptr
)
106 android_memory_barrier();
107 return android_atomic_cas(old_value
, new_value
, ptr
);
111 extern inline int32_t android_atomic_swap(int32_t new_value
,
112 volatile int32_t *ptr
)
114 int32_t prev
, status
;
116 __asm__
__volatile__ (
117 " move %[status], %[new_value]\n"
118 " ll %[prev], (%[ptr])\n"
119 " sc %[status], (%[ptr])\n"
120 : [prev
] "=&r" (prev
), [status
] "=&r" (status
)
121 : [ptr
] "r" (ptr
), [new_value
] "r" (new_value
)
123 } while (__builtin_expect(status
== 0, 0));
124 android_memory_barrier();
128 extern inline int32_t android_atomic_add(int32_t increment
,
129 volatile int32_t *ptr
)
131 int32_t prev
, status
;
132 android_memory_barrier();
134 __asm__
__volatile__ (
135 " ll %[prev], (%[ptr])\n"
136 " addu %[status], %[prev], %[inc]\n"
137 " sc %[status], (%[ptr])\n"
138 : [status
] "=&r" (status
), [prev
] "=&r" (prev
)
139 : [ptr
] "r" (ptr
), [inc
] "Ir" (increment
)
141 } while (__builtin_expect(status
== 0, 0));
145 extern inline int32_t android_atomic_inc(volatile int32_t *addr
)
147 return android_atomic_add(1, addr
);
150 extern inline int32_t android_atomic_dec(volatile int32_t *addr
)
152 return android_atomic_add(-1, addr
);
155 extern inline int32_t android_atomic_and(int32_t value
, volatile int32_t *ptr
)
157 int32_t prev
, status
;
158 android_memory_barrier();
160 __asm__
__volatile__ (
161 " ll %[prev], (%[ptr])\n"
162 " and %[status], %[prev], %[value]\n"
163 " sc %[status], (%[ptr])\n"
164 : [prev
] "=&r" (prev
), [status
] "=&r" (status
)
165 : [ptr
] "r" (ptr
), [value
] "Ir" (value
)
167 } while (__builtin_expect(status
== 0, 0));
171 extern inline int32_t android_atomic_or(int32_t value
, volatile int32_t *ptr
)
173 int32_t prev
, status
;
174 android_memory_barrier();
176 __asm__
__volatile__ (
177 " ll %[prev], (%[ptr])\n"
178 " or %[status], %[prev], %[value]\n"
179 " sc %[status], (%[ptr])\n"
180 : [prev
] "=&r" (prev
), [status
] "=&r" (status
)
181 : [ptr
] "r" (ptr
), [value
] "Ir" (value
)
183 } while (__builtin_expect(status
== 0, 0));
187 #endif /* ANDROID_CUTILS_ATOMIC_MIPS_H */